| /* |
| * |
| * Copyright 2017, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <string.h> |
| |
| #include "src/core/ext/filters/http/client/http_client_filter.h" |
| #include "src/core/ext/filters/http/message_compress/message_compress_filter.h" |
| #include "src/core/ext/filters/http/server/http_server_filter.h" |
| #include "src/core/lib/channel/channel_stack_builder.h" |
| #include "src/core/lib/surface/call.h" |
| #include "src/core/lib/surface/channel_init.h" |
| #include "src/core/lib/transport/transport_impl.h" |
| |
| typedef struct { |
| const grpc_channel_filter *filter; |
| const char *control_channel_arg; |
| } optional_filter; |
| |
| static optional_filter compress_filter = { |
| &grpc_message_compress_filter, GRPC_ARG_ENABLE_PER_MESSAGE_COMPRESSION}; |
| |
| static bool is_building_http_like_transport( |
| grpc_channel_stack_builder *builder) { |
| grpc_transport *t = grpc_channel_stack_builder_get_transport(builder); |
| return t != NULL && strstr(t->vtable->name, "http"); |
| } |
| |
| static bool maybe_add_optional_filter(grpc_exec_ctx *exec_ctx, |
| grpc_channel_stack_builder *builder, |
| void *arg) { |
| if (!is_building_http_like_transport(builder)) return true; |
| optional_filter *filtarg = arg; |
| const grpc_channel_args *channel_args = |
| grpc_channel_stack_builder_get_channel_arguments(builder); |
| bool enable = grpc_channel_arg_get_bool( |
| grpc_channel_args_find(channel_args, filtarg->control_channel_arg), |
| !grpc_channel_args_want_minimal_stack(channel_args)); |
| return enable ? grpc_channel_stack_builder_prepend_filter( |
| builder, filtarg->filter, NULL, NULL) |
| : true; |
| } |
| |
| static bool maybe_add_required_filter(grpc_exec_ctx *exec_ctx, |
| grpc_channel_stack_builder *builder, |
| void *arg) { |
| return is_building_http_like_transport(builder) |
| ? grpc_channel_stack_builder_prepend_filter( |
| builder, (const grpc_channel_filter *)arg, NULL, NULL) |
| : true; |
| } |
| |
| void grpc_http_filters_init(void) { |
| grpc_register_tracer("compression", &grpc_compression_trace); |
| grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL, |
| GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_optional_filter, &compress_filter); |
| grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL, |
| GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_optional_filter, &compress_filter); |
| grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, |
| GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_optional_filter, &compress_filter); |
| grpc_channel_init_register_stage( |
| GRPC_CLIENT_SUBCHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_required_filter, (void *)&grpc_http_client_filter); |
| grpc_channel_init_register_stage( |
| GRPC_CLIENT_DIRECT_CHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_required_filter, (void *)&grpc_http_client_filter); |
| grpc_channel_init_register_stage( |
| GRPC_SERVER_CHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY, |
| maybe_add_required_filter, (void *)&grpc_http_server_filter); |
| } |
| |
| void grpc_http_filters_shutdown(void) {} |